National Geographic"The Falcon can fly for an hour, and it’s easy to operate. “You just put in the coordinates, and it flies itself,” says Benjamin Miller, who manages the unmanned aircraft program for the sheriff ’s office. To navigate, Johnson types the desired altitude and airspeed into the laptop and clicks targets on a digital map; the autopilot does the rest. To launch the Falcon, you simply hurl it into the air. An accelerometer switches on the propeller only after the bird has taken flight, so it won’t slice the hand that launches it."